文件下载

[zt]http://mornstar.blog.sohu.com/12594838.html
JSP下载指定服务器目录的文件，支持中文路径

 1 <%@page language="java" contentType="application/x-msdownload" import="java.io.*,java.net.*" pageEncoding="gb2312"%>
 2 <%!
 3 public String convert(String s) {
 4     try {
 5         return new String(s.getBytes("ISO-8859-1"), "GB2312");
 6     } catch (Exception e) {
 7         return null;
 8     }
 9 }
10 public String getFileName(String fileName) {
11     return fileName.substring(fileName.lastIndexOf("\\") + 1, fileName.length());
12 }
13 %>
14 <%
15 response.reset();
16 response.setContentType("application/x-download");
17 String filepath = convert(request.getParameter("filepath"));
18 String filenamedisplay = getFileName(filepath);
19 filenamedisplay = URLEncoder.encode(filenamedisplay, "UTF-8");
20 response.addHeader("Content-Disposition", "attachment;filename=" + filenamedisplay);
21 OutputStream output = null;
22 FileInputStream fis = null;
23 try {
24     output  = response.getOutputStream();
25     fis = new FileInputStream(filepath);
26     byte[] b = new byte[1024];
27     int i = 0;
28     while((i = fis.read(b)) > 0) {
29         output.write(b, 0, i);
30     }
31     output.flush();
32 } catch(Exception e) {
33     System.out.println("Error!");
34     e.printStackTrace();
35 } finally {
36     if(fis != null) {
37         fis.close();
38         fis = null;
39     }
40     if(output != null) {
41         output.close();
42         output = null;
43     }
44 }
45 %>